[hoa 11] cau nay lam sao nhi

P

phidoigabay940

pt: H2SO4 + Mg ........ H2 + MgSO4
nH2=1.12:22.4=0.05mol
nH2SO4=nH2=0.05mol
vay so mol H2SO4 trong dd la 0.05mol
pt dien li H2SO4.......2H+ + SO4 2-
.............. 0.05 ........ 0.1 ....0.05 mol
vay [H+] = 0.1 :0.1 = 1M
chon dap an c
bai nay co gi sai xot mong ban bo qua
 
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